| Abbreviation | Definition |
|---|---|
| ARVS | Animal Rescue Veterinary Services |
| ARVS | Association of Racecourse Veterinary Surgeons |
| ARWL | Arkansas Wildlife |
| ASAB | Association for the Study of Animal Behaviour |
| ASAE | American Society of Agricultural Engineers |
| ASAS | American Society of Animal Science |
| ASAVA | Australian Small Animal Veterinary Association |
| ASB | American SaddleBred |
| ASB | Australian Stud Book |
| ASCA | Australian Shepherd Club of America |
| ASCOBANS | Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas |
| ASD | Action for Singapore Dogs |
| ASF | African Swine Fever |
| ASGN | All Systems Grossly Normale |
| ASH | Australian Society of Herpetologists |
| ASIA | American Sheep Industry Association |
| ASIH | American Society of Ichthyologists and Herpetologists |
| ASK | Animals Seeking Kindness |
| ASLAP | American Society of Laboratory Animal Practitioners |
| ASM | American Society of Mammalogists |